I've seen people come and go from these forums, who came as crossdressers, realized they needed to transition, had SRS, and disappeared into the sunset. That isn't debatable. It happened.
There are a number of crossdressers, like above, that are simply transsexuals that haven't admitted it to themselves yet.
There are a number of people that crossdress because they can't or won't transition for any number of reasons.
A large number of crossdressers, I don't mean to speak for them btw, this is just my observation, do so because of identifying one way or another with females, and being turned on has nothing or little to do with it.
Many of those same people do have low-intensity gender dysphoria which they mitigate through crossdressing.
So to me, that's fuzzy. I'm not going to argue about it.
Is there anything remotely similar between somebody that identifies as 100% male and crossdresses solely for sexual, fetishistic, or attention craving reasons and a transsexual woman mid-transition? No.